Boeing Co. says its second-quarter earnings fell 19 percent as lower costs failed to offset a previously disclosed charge of $248 million related to a defense program.

The Chicago-based airplane maker says it earned $852 million, or $1.16 per share, for the three months ended June 30, compared with $1.05 billion, or $1.35 per share, a year earlier.

Revenue remained essentially flat at $17 billion.